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The origin of metal-poor and metal-rich globular clusters in E-MOSAICS

Published online by Cambridge University Press:  11 March 2020

Marta Reina-Campos Open the ORCID record for Marta Reina-Campos [Opens in a new window]
Marta Reina-Campos*
Affiliation:
Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg, Mönchhofstraße 12-14, 69120 Heidelberg, Germany email: [email protected]
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Abstract

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It has been a long-standing open question why observed globular cluster (GC) populations of different metallicities differ in their ages and spatial distributions, with metal-poor GCs being the older and radially more extended of the two. We use the suite of 25 Milky Way-mass cosmological zoom-in simulations from the E-MOSAICS project, which self-consistently model the formation and evolution of stellar clusters and their host galaxies, to understand the properties of observed GC populations. We find that the different ages and spatial distributions of metal-poor and metal-rich GCs are the result of regular cluster formation at high redshift in the context of hierarchical galaxy assembly. We also find that metallicity on its own is not a good tracer of accretion, and other properties, such as kinematics, need to be considered.

Keywords

globular clusters: generalgalaxies: star clustersgalaxies: formationgalaxies: evolutionmethods: numerical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S351: Star Clusters: From the Milky Way to the Early Universe , May 2019 , pp. 147 - 150
Copyright
© International Astronomical Union 2020

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